Cut-off regulator and indicator for steam-engines.



E. LEWIS.

CUT-OFF REGULATOR AND INDICATOR FOR STEAM ENGINES.

APPLICATION FILED OCT. 24. 1916 l ,246 62 1 Patented Nov. 13, 1917.

2 SHEETS-SHEET I.

E. LEWIS.

CUT-OFF REGULATOR AND INDICATOR FOR STEAM ENGINES.

APPLICATION FILED OCT. 24 I916- Patented N 0V. 13, 1917.

2 SHEETS-SHEET 2- 1 1r ED srarres onrron,

ERNEST Lnwrs, ornunmne'rorr, New; JERSEY.

cur-om nnonna'ron AND-INDICATOR "For. smart-mourns,

To all whom it may concern: Be it known that I, Ennns'r Lnwrs, a citizen of the United States, and a resident of Burlington, county of Burlington, State of New Jersey, have invented Cut-Ofi' Regu variant conditions occurring in the operation of these engines, will be apparent to one skilled in the art.

The device herein described has a special application to engines having the Corliss valve gear and consists in a novel .arrangef ment of the reach rods controlling the cutof? mechanisms, wherein a link is interposed between the rods of the high and low pressure cylinders. The link carries a set screw which when turned varies the range of cut off in the low pressure cylinder, there being a correspondingvariation in the range of the high pressure cut ofi', due to the action of the governor, to which the reach rods on the high pressure side are connected. To points on the link, or allied members, are attached by suitable connecting means the pointers of a I compound indicating gage which is set to indicate the exact range of cut off in the cylinders.

Referring to the drawings:

:igure 1 is a view in side elevation of a tandem engine having the Corliss valve mechanism, showing the distribution of the reach rods, link and gages.

Figs. 2 and 3 are views showing the details of the link.

Figs. 4. and 5 are views showing the details of the gage.

Figs. 6 and 7 are views in perspective of the pointers of the gage.

in Fig. 1, 1 is the overnor which is connected through a bell crank 2 and a rod 3 to a link arm 4 pivotally mounted on an arm 5 held by the bracket 6, attached to any suitable point on the engine body, in the present case to the low pressure cylinder casing. To the link arm 4 are attached reach rods 7 and 8 wh ch connect at their other extremities with the levers 9 and 10 Specification of Letters Patent. Nbv. 13, 191 '7. Application filed October 24,1910; Serial No. 137,417.

respectively on collars bearin "cams 11 and .12 which tripthe out ofi' mec anism of the high pressure cylinder j 13 at the desired point in the stroke. The governor acts directly upon the high pressure cut oil mecha nism through the" various rods and the link.

Pivoted'on the arm 5 andcapable of independent movement. relative to the link arm 4 is an arml4 which is adjustably connected at its outer'end to the arm 4 b means of an adjusting, screw 15", said a justin screw entering threaded bearings 16 and 1 in the extremities of the two arms. Attached to the arm 14st a suitable point is .a rod l8 whi ch isattachedto a lever 19 on a collar bearin a cam 20 whichtrips the out ofl mechanism at one'end of the low pressure cylinder. 21. Upon the cam collar whichbearsthe lever 19 is a lever22 which is connected through the'reach ma-23 with a lever 24 on a collar bearing a cam 25 which trips the *outiofi" mechanism at the other end ofthe low pressure cylinder. It

will be seen that the mechanismcontrolling the ranges of cut ofi' in the cylinders are adj listably connected to one another through the various rods, the link arms4 and 14 and the screw 15f. I

. Attached at. "suitable points to the link arms 4: and 14 are'rods 26"and 27, which form connections with the indicating means.

The indicator is shown in detail in Figs. 4 and 5. Within the casing 28 are ivotally mounted the segmental gears 29 and 30'each having an extension, respectively 31 and 32, to the extremities of which are connected the I rods 26 and 27 I These ears mesh with the segmental gears 33; an 34 which are pivotally mounted as shown and which carry the hands or pointers 35 and 36, said pointers indicating respectively the ran eof cut off in the high and low pressure c lin ers, It will be noticed that a single a uated scale, 37,

is used for both the big and low pressure pointers, this being made possible by the bending over and downward of the. rear pointer, as. clearly shown in Fig. 6. The

rods 26 and 27 are furnished with adjusting high pressure cylinder may be recorded during the period of operation of the engine.

he following is one method for calibrating the scale of the gage. The travel of the high pressure piston may be laid ofi on the crosshead guide as defin'ed by the position of the crosshead when the engine is on its dead centers, and this distance divided into any number, say ten, of equal parts. The en-' inc. is then turned over in the direction it is to run until the edge of the crosshead co incides with the second division on the guide.

With the valve gear hooked u 'the gov? ernor is raised by means of a fine threaded screw until the valve is tripped. This osition-representsacut off at one tenth o the stroke and the high pressure pointer should indicate such on the gage scale. This procedure is repeated for the other points. For the low pressure cylinder the procedure is the same with the exception that the adjusting screw 15 is used to'trip the valve mechanism.

The operation of the device as herein de scribed will be apparent to those acquainted with the art. The operator, on turning the, adjusting screw 15, will notice a change in.

the range of the low pressure cut ofi as shown on the gage, and a corresponding.

change in the range of the high pressure cut off due to the action of the governor will ,follow. By turning the screw he will be able to so adjust the cut off in the low pressure cylinder as to obtain the earliest possible cut off in the high pressure cylinder.

of inlet and outlet'valves therefor, a governor, means connecting the governorwith the inlet valves of the high pressure cylinder, manually adjustable connecting means between the aforesaid connecting means and the inlet valves of the low pressure cylinder, whereby the out 01f of the low pressure valves 'may be independently adjusted, and means connected to said connectin means for indicating the range of cut 0% in the cylinders.

2. In acompound engine the combination with high and low pressure cylinders, of inlet and outlet valves therefor, a governor, a link mechanism consisting of two pivoted arms, the governor and high pressure valve mechanism being connected to one arm and said low pressure valve mechanism being connected to the other arm, and a manually operated adjusting member connecting said pivoted arms for independently adjusting the cut off in the low pressure cylinder.

3. In a compound engine, in combination with high and low pressure cylinders suplplied with cut off valves, a governor, a link mechanism comprising two pivoted lever arms, rods connecting one arm to the govern'or and to the cut oil valves of the high pressurecylinder, rods connecting the other arm to the out 01f valves of the low pressure cylinder, and an adjusting member con necting the two arms whereby an independpressure cut off ent adjustment of the low may be obtained.

it. In combination with the governor and valve mechanism of a compound engine, a link consisting of two armspivotally mounted and adjustably connected, a rod co'nnecting one arm to the governor, said arm being also connected to the cut off mechanism of the high pressure cylinder and said other arm being connected to the out off mechanism of the low pressure cylinder, and a gage having two pointers connected respectively to the said two arms, for indicating the range of cut off in the cylinders.

ERNEST LEWIS. 

